Olympus E-PM2 vs Pentax 645D

Here is a in-depth comparison of the Olympus E-PM2 and Pentax 645D, former being a Entry-Level Mirrorless while the other is a Pro DSLR by companies Olympus and Pentax. There exists a large gap among the resolutions of the E-PM2 (16MP) and 645D (40MP) and the E-PM2 (Four Thirds) and 645D (Medium format) offer totally different sensor measurements.

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The E-PM2 was revealed 3 years later than the 645D and that is a fairly serious difference as far as camera technology is concerned. Both the cameras feature different body design with the Olympus E-PM2 being a Rangefinder-style mirrorless camera and the Pentax 645D being a Large SLR camera.

Before going into a detailed comparison, here is a brief introduction of how the E-PM2 scores against the 645D for portability, imaging, features and an overall rating.

The following is a sample of the gallery pictures for Olympus PEN E-PM2 & Pentax 645D. The full galleries are available at Olympus E-PM2 Gallery & Pentax 645D Gallery.

For anybody who is looking to carry your camera regularly, you will have to think about its weight and measurements. The Olympus E-PM2 enjoys outside dimensions of 110mm x 64mm x 34mm (4.3" x 2.5" x 1.3") with a weight of 269 grams (0.59 lbs) while the Pentax 645D has proportions of 156mm x 117mm x 119mm (6.1" x 4.6" x 4.7") with a weight of 1480 grams (3.26 lbs).

See the Olympus E-PM2 and Pentax 645D in our completely new Camera & Lens Size Comparison Tool.

Do not forget, the weight of an ILC will differ depending on the lens you have attached at that moment. The following is a front view sizing comparison of the E-PM2 against the 645D.

Taking into account dimensions and weight, the portability score of the E-PM2 and 645D is 89 and 50 respectively.

Sometimes, its difficult to see the gap in sensor sizing simply by viewing a spec sheet. The visual below will offer you a clearer sense of the sensor dimensions in the E-PM2 and 645D.

As you can see, both of those cameras feature different megapixel count and different sensor sizing. The E-PM2 having a smaller sensor will make achieving shallow depth of field trickier and the Pentax 645D will provide you with more detail because of its extra 24MP. Greater resolution can also allow you to crop pics way more aggressively. The fresher E-PM2 is going to have an advantage with regard to sensor technology.